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High-performance automatic air vent

38572.0

4

Function

Product range

Code 551004A  DISCALAIR high performance automatic air vent

3/4" male 

NPT 

and

 

1/2”  female

 NPT

 pipe connection 

size

s

 

3/4" male 

NPT 

and

 

1/2” female

 NPT

Technical specification

 

Connections:

Materials:

 

-

 

Body

brass

- Float

PP

- Stem

brass

- Seals

peroxide-cured EPDM

Suitable fluids:

water, glycol solution

Max percentage of glycol:

50%

Max working pressure:

150 psi (10 bar)

Max discharge pressure:

150 psi (10 bar)

Temperature range:

32-2

3

0°F (0-1

1

0°C)

1

www.caleffi.com

551 Series

The DISCALAIR® is a high performance automatic air vent that is capable of releasing 

large amounts of air from hydronic systems. The venting mechanism is the same 

proven design that is used in Caleffi’s 551 series air separators, providing years of 

reliable service.

This item is designed for use in closed hydronic systems. Do not use in plumbing 

applications. This item does not meet the low-lead plumbing standards of U.S. and 

Canada.

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Installation Tip

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AIR VENTS

 

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Copyright 2020 Caleffi

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